P46 or P-46 may refer to:
Vessels
* , a corvette of the Argentine Navy
* , a submarine of the Royal Navy
* , a corvette of the Indian Navy
*
Other uses
*
Curtiss XP-46
The Curtiss XP-46 was a 1940s American prototype fighter aircraft. It was a development of the Curtiss-Wright Corporation in an effort to introduce the best features found in European fighter aircraft in 1939 into a fighter aircraft which could ...
, an American prototype fighter aircraft
*
Heckler & Koch UCP, a prototype pistol
*
P46 road (Ukraine)
*
Papyrus 46, a biblical manuscripts in Greek
*
Phosphorus-46, an isotope of phosphorus
* P46, a
Latvian state regional road
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